周迅;刘林;叶永红;

• 1:中国地质大学(武汉)
• 2:中国地质调查局南京地质调查中心

摘要(Abstract)：

以粒径0.45μm为悬浮态和溶解态区分界限,采用高分辨电感耦合等离子体质谱(HR-ICP-MS)法,测定并分析了南通市沿江地区潜水的稀土元素质量浓度、形态、分布特征和分配模式,为识别地下水污染来源提供依据。结果表明:潜水中稀土元素质量浓度很低,溶解态稀土元素的质量浓度均值和空间分布均衡性高于悬浮态。潜水中溶解态轻稀土元素质量浓度、分布均匀性高于溶解态重稀土元素。潜水溶解态稀土元素质量浓度在Eh<50mV时,与Eh值正相关;在Eh>50mV时呈负相关。潜水溶解态稀土元素呈现Ce负异常,Eu正异常,北美页岩标准化分配模式则表现出轻稀土元素富集现象。溶解态轻稀土元素质量浓度与pH值呈负相关,溶解态重稀土质量浓度与pH值呈正相关。潜水溶解态轻稀土元素富集程度与水动力条件呈现显著的负相关关系,并在空间分布上呈现水平分带,这为从区域水动力条件角度认识地下水中物质的富集效应提供了新的途径。

关键词(KeyWords)： 潜水;稀土元素;分配模式;南通;沿江地区

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41302209)

作者(Author): 周迅;刘林;叶永红;

Email:

DOI: 10.19509/j.cnki.dzkq.2018.0328

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